Learning Science Online - Objective Questions Answers - 12 Sep 2014

1. Which plant is called "Herbal Indian Doctor"?
[A]Neem
[B]Amla
[C]Tulsi
[D]Mango


2. The phenomenon of light associated with the appearance of blue colour of sky is _______________________.
[A]Refraction
[B]Interference
[C]Scattering
[D]Reflection


3. Which noble gas is used for treatment of cancer?
[A]Argon
[B]Krypton
[C]Helium
[D]Radon


4. Mirage is an example of ________________________________.
[A]Refraction of Light
[B]Total Internal Reflection of Light
[C]Dispersion of Light
[D]Refraction and Total Internal Reflection of Light


5. Nowadays yellow lamps are frequently used as street lights. Which among the following gases, is used in these lamps?
[A]Neon
[B]Sodium
[C]Hydrogen
[D]Nitrogen